NYLON FULLY INSULATED CLOSE END CONNECTORS
 
Specifications:
 Maximum Electrical Rating: 300 Volts
 Maximum Temperature: +105C
 Terminal Material: Copper
 Plating: Tin
 Insulated Material: Nylon
 
Full Spec Sheet:
https://www.nteinc.com/terminals/pdf/Close_End_Twist_On_Splice.pdf